Security Advisory Summary:
SolarWinds Serv-U 15.5.4 patches four critical vulnerabilities:
• CVE-2025-40538 – Broken access control → system admin creation + root RCE
• Two type confusion flaws → root code execution
• One IDOR vulnerability → elevated execution

Attack prerequisites:
High-privileged access required. Exploitation likely via credential compromise or chained privilege escalation.

Exposure landscape:
12K+ internet-facing instances observed (Shodan)
File transfer platforms remain ransomware-favored entry vectors

Historical context:
Prior Serv-U CVEs exploited by ransomware groups and state-aligned actors.

Immediate actions:
- Patch to 15.5.4
- Audit privileged accounts
- Review FTP/SFTP exposure
- Monitor for anomalous admin creation

Source: https://www.bleepingcomputer.com/news/security/critical-solarwinds-serv-u-flaws-offer-root-access-to-servers/

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#Infosec #SolarWinds #ThreatIntel #CVE2025 #RCE #PrivilegeEscalation #BlueTeam #SecurityEngineering #AttackSurface #ZeroTrust

How I Escalated Privileges from ‘User’ to ‘Admin’
This article covers a privilege escalation vulnerability, allowing an unauthorized user to access administrative functions. The flaw was due to the application using weak permissions for file uploads (e.g., copying user-uploaded files into the ‘admin’ directory). By modifying an image file's name to include the ‘index.php’ extension (image_name.jpg.index.php), the researcher overwrote the existing index.php file within the 'admin' folder upon upload. This resulted in their uploaded content being served as the admin dashboard. The attacker then leveraged a JavaScript payload injected into their malicious image file to execute arbitrary PHP code, allowing them to access and manipulate the entire application. A realistic consequence would be an unauthorized user gaining control over sensitive data, functionality, or settings. The researcher received $500 as payout from the bug bounty program, with the company fixing the issue by validating uploaded file names and restricting permissions for sensitive directories. Key lesson: Strictly enforce access controls and validate all user-supplied input to prevent privilege escalation vulnerabilities. #BugBounty #PrivilegeEscalation #FileUploads #WebSecurity #Cybersecurity

https://infosecwriteups.com/how-i-escalated-privileges-from-user-to-admin-0e6aa72274fc?source=rss------bug_bounty-5

Privilege Escalation Is Everything: 12 Real-World Chains That Lead to Full Account Takeover
This article discusses a collection of 12 privilege escalation chains that culminated in full account takeovers. The researcher identified and combined multiple vulnerabilities, including authentication bypass, authorization flaws, and information disclosure issues to gain elevated access. By exploiting these chained vulnerabilities, they obtained administrative privileges or compromised high-value accounts. For instance, one case involved an account with read-only permissions on a vulnerable forum platform. Leveraging IDOR (Insecure Direct Object References), the researcher manipulated post IDs to access other users' posts and gain write access. This allowed them to modify the password of a privileged user, escalating their own permissions. The impact was significant, as full account takeover often led to data breaches or unauthorized actions. No bounty amounts were disclosed in this article. To prevent such chains, validate inputs on multiple layers and implement least privilege principles for accounts and permissions. Key lesson: Vulnerabilities don't need to be critical; combining multiple issues can lead to serious consequences. #BugBounty #PrivilegeEscalation #Cybersecurity #WebSecurity #IDOR

https://cybersecuritywriteups.com/privilege-escalation-is-everything-12-real-world-chains-that-lead-to-full-account-takeover-1edea063a055?source=rss------bug_bounty-5

@[email protected] Habe gelesen, daß es für Desktops mit IntelCPU nur 5% Leistungsgewinn bringt,?! Also hab ich mich nicht weiter damit beschäftigt 🤔 teste ich mal an einem offline Rechner 👍 Die Einschätzung des Risikos durch z.B. #spectre oder #meltdown und mögliche #Angriffsvektoren habe ich anderen überlassen, jetzt stellt sich mir auch noch mal die Frage, wie groß ist das Risiko für welche Nutzungsszenarien?

#itsec #malware #ransomware #phishing #privilegeescalation #linux #foreshadow #zombieload

🔥 Open-source project: Automated audit & hardening of Linux cron jobs (LPE detection & scripts)

After several months of research and lab testing, I’m releasing a complete guide + scripts to detect and fix privilege escalation via misconfigured cron jobs on Linux (automated audit, exploitation examples, hardening tips, etc.).

💡 Example: root shell on a cloud VM through a simple cron misconfiguration (see screenshot).

For sysadmins, SecOps, pentesters, or anyone passionate about Linux security.

👉 GitHub repo: https://github.com/privlabs/lpe-cron-misconfig-2025

Feel free to test, comment, or contribute! Would love your feedback or stories of similar issues you’ve found.

#linux #infosec #sysadmin #opensource #cybersecurity #privilegeescalation